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US 5,290,828 AGranted
Aqueous dispersed acrylic grafted epoxy polyester protective coatings
AssigneeThe Glidden Company
InventorsGary P. Craun, Daniel Bode, Denise E. Yancey
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Abstract
An aqueous dispersed, low VOC coating containing a polymeric binder comprises an addition copolymer grafted epoxy polyester terpolymer. The graft terpolymer comprises by weight between 1% and 70% unsaturated polyester, 5% and 80% epoxy resin, and 5% and 70% addition copolymer, where the terpolymer has an Acid Number above about 30 and is dispersed into water with a volatile base.
Claims11
An aqueous dispersed, low VOC coating composition containing a polymeric binder dispersed in water comprising:
- an addition copolymer grafted epoxy-polyester terpolymer comprising by weight between about,
- (a) 1% and 70% unsaturated polyester having a number average molecular weight between about 200 and 20,000 and produced by esterifying dicarboxylic acid and diol where said dicarboxylic acid comprises 1% to 5% unsaturated dicarboxylic acid;
- (b) 5% and 80% epoxy resin;
- (c) 5% and 70% addition copolymer grafted to said polyester and said epoxy resin, said addition copolymer comprising copolymerized ethylenically unsaturated monomers where said monomers comprise between 20% and 100% carboxyl functional ethylenic monomers with the balance being other ethylenic monomers, where said monomers are copolymerized in the presence of the unsaturated polyester and the epoxy resin to produce the addition copolymer grafted epoxy-polyester having an Acid Number above about 30.
1 more element
Dependencies are inferred from the claim text.